708 RADIATION BIOLOGY 



(1942) The problem of dominant lethals. J. Genetics, 43: 295-300. 



(1944) Drosophila Inform. Serv., 18. 



and H. J. Muller (1941) The lethality of dicentric chromosomes in Drosophila. 



Genetics, 26: 165. 



Ray Chaudhuri, S. P., and I. Bose (1948) Meiosis in diploid and tetraploid spermato- 

 cytes of Attractomorpha sp. (Acrididae). Proc. Zool. Soc. Bengal, 1: 1-12. 



Reynolds, J. P. (1941) X-ray-induced chromosome rearrangements in the females of 

 Sciara. Proc. Natl. Acad. Sci. U.S., 27: 204-208. 



Rick, C. M. (1940) On the nature of X-ray-induced deletions in Tradescantia chromo- 

 somes. Genetics, 25: 466-482. 



Ris, H. (1942) A cytological and experimental analysis of the meiotic behavior of 

 the univalent X-chromosome in the bearberry aphid Tamalia ( = Phyllaphis) 

 coweni (Ckll.). J. Exptl. Zool., 90: 267-330. 



Rugh, R. (1939) Developmental effects resulting from exposure to X-rays. I. 

 Effect on the embryo of irradiation of frog sperm. Proc. Am. Phil. Soc, 81: 

 447-471. 



(1950) The immediate and delayed morphological effects of X-radiations on 



meiotic chromosomes. J. Cellular Comp. Physiol., 36: 185-203. 



and F. Exner (1940) Developmental effects resulting from exposure to 



X-rays. II. Development of leopard frog egg activated by bull frog sperm. 

 Proc. Am. Phil. Soc, 83: 607-617. 



Sax, K. (1940) An analysis of X-ray-induced chromosomal aberrations in Trades- 

 cantia. Genetics, 25: 41-68. 



(1941) Types and frequencies of chromosomal aberrations induced by 



X-rays. Cold Spring Harbor Symposia Quant. Biol., 9: 93-103. 



and C. P. Swanson (1941) Differential sensitivity of cells to X-rays. Am. J. 



Botany, 28: 52-59. 

 Schjeide, O. A., and B. M. Allen (1950) The relation of mitosis to the manifestation 



of X-ray damage in hematopoietic cells of tadpoles. USAEC Report UCLA-94. * 

 Scholes, G., G. Stein, and J. Weiss (1949) Action of X-rays on nucleic acids. 



Nature, 164: 709-710. 

 Schultz, J. (1936) Radiation and the study of mutations in animals, in Biological 



effects of radiation, ed. B. M. Duggar. McGraw-Hill Book Company, Inc., 



New York, Vol. II, pp. 1209-1261. 

 and H. Redfield (1932) The constitution of germinal material in relation to 



heredity. Carnegie Inst. Wash. Year Book, No. 31, pp. 303-307. 

 Shapiro, N. P. (1945) On the nature of crossing-over induced by X-rays in males of 



Drosophila melanogaster. Compt. rend. acad. sci. U.R.S.S., 49: 292-295. 

 Slizynska, H., and B. M. Slizynski (1947) Genetical and cytological studies of 



lethals induced by chemical treatment in Drosophila melanogaster. Proc. Roy. 



Soc. Edinburgh, B62: 234-242. 

 Slizynski, B. M. (1938) Salivary chromosome studies of lethals in Drosophila mel- 

 anogaster. Genetics, 23: 283-290. 



(1950) Partial breakage of salivary gland chromosomes. Genetics, 35: 



279-287. 



Smith, D. B., and G. C. Butler (1951) On the mechanism of the action of ionizing 

 radiations on sodium thymonucleate. J. Am. Chem. Soc, 73: 258-261. 



Snell, G. D. (1935) The induction by X-rays of hereditary changes in mice. Genet- 

 ics, 20: 545-567. 



(1941) Induction by roentgen rays of hereditary changes in mice. Radi- 

 ology, 36: 189-196. 



- and F. B. Ames (1939) Hereditary changes in the descendants of female 



mice exposed to roentgen rays. Am. J. Roentgenol., 41: 248-255. 



